Rope-drum.



No. 821,305. PATENTED MAY 22, 1906.

T. S. MILLER.

ROPE DRUM.

APPLICATION FILED MAR.16.1903. RENEWED JAN.22,1904.

2 SHEETSSHEET 1.

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wane/Mum mm! w. SQQZM PATBNTED MAY 22, 1206.

7 T. S. MILLER.

,ROPB DRUM. APPLICATION TILED MAIL16. 120s. RENEWED JAN. 22, 1204.

F n I v 2 SHEETS-SHEET 2.

UNTTED PATENT OFFTQEO RUPE- Specification Letters Patent.

DRUM.

Patented May 22, 1906.

Application filed March 16, 1903- Renewed January 22, 1904. Serial No:190,170.

To all whom, it may concern:

Be it known that I, THOMAS SPENCER MIL- LER, of South Orange, county ofEssex, and State of New Jersey, have invented a new and usefulImprovement Applicable to Rope- Drums, of'which the following is aspecification.

The object which has primarily led to the making of my invention is toeliminate the thrust-pin friction which has heretofore been the sourceof great annoyance and disadvantages and loss of power in such rope-drummechanism as that shown, for example, in the Beekman patent, No.541,308; but my invention embodies principles which are susceptible of abroader field of application.

In the accompanying drawings, Figure 1 is I a rope-drum, partly insection, embodying my invention. Figs. 2 and 3 are details.

1 and 2 are stationary end frames carrying the bearings of the shaft 3.

4 is the bushing of the bearing in the frame 2, which bushing containsthe interior flanges 5 and 6, projecting intocorresponding grooves ofthe shaft to hold the shaft against longitudinal movement.

7 is the prime mover of the mechanism, which in this case is aspur-wheel driven from any suitable source of power and fixed upon theshaft 3.

8 is the friction-ring, fixed to the face of the spur-wheel andpreferably composed of sections of wood in the form shown.

9 is the rope-drum, carrying the flange 10, containing the groove whichcooperates with the friction-ring 8 to form a friction-clutch. This drumis so mounted upbn the shaft 3 as to have freedom of both longitudinaland circumferential movement thereon.

11 is the band-brake, cooperating with th exterior of the drum-flange10.

12 is a coiled spring interposed between the hubs of the spur-wheel anddrum and tending to separate the surfaces of the friction-clutch.

13 is the cross-key, operating in a slot ex tending diametricallythrough the shaft and arrangedto thrust the drum toward the spurwheel inantagonism to the spring 12, so as to set the clutch.

14 is the thrust-pin, operating against the cross-key and extendingthence through the center of the shaft to and beyond the end thereof.

15 is a yoke secured to the outer side of the thrusting the pin 14 bythe power of the hand-v screw 17:

18 is a shell or case fixed on the end of the shaft 3 outside of theframe 2 and containing the internal chamber 19, into which projects theend of the thrust-pin 14. Into the opposite end of this chamber isscrew-threaded a cap 20, containing a central opening 21, through whichthe end of the hand-screw 17 projects into the chamber 19.

22 and 23 are two heads movable longitudinally in the chamber 19 andconnected by the toggles 24, 24, 25, and 25. The head 22 abuts againstthe end of the thrust-pin 14, and the head 23 abuts against theadjustable cap 20, from which it is separated by a felt washer 26. Fixedto the end of the shaft of the hand-screw 17 is a tapering head 27, thesides of which are preferably of the curvature shown.

28 and 29 are stops arranged between the walls of the case 18 and themembersof the toggles to prevent the toggles from self-loch ing bymoving as far as straight or flat position.

Any sus' table carri er of the spreader 27 might be substituted for thehand-screw shaft 17, and the power-multiplying mechanism might bechambered within the shaft, so as to de-v liver its thrust upon the drumwithout the presence of many of the parts herein described aspreferable.

The operation is as follows: When the parts are in the position shown inFig. 3, the clutch is unset and the drum is substantially free upon theshaft. By moving the handscrew 17 from the position shown in Fig. 3toward the position shown in Fig. 2 the ad Vance of the head 27 spreadsthe toggle members 24 and 25 gradually apart, so as to force the drumforward and gradually set the clutch, the thrust of the toggles, in thepreferable construction shown, being transmitted to the drumthrough thehead 22, the thrustpin 14, and the cross-key 13. The resistance of aclutch to being set increases during the progress of setting, and thepower of the thrusting apparatus shown correspondingly increases as thetoggles are spread farther apart, wherefore the thrusting apparatusshown isparticularly well adapted for the work to be performed byit. Theconvexedlyformed surface of the head or spreader 27 is such that itspreads the toggles apart. The angle of its contacting surface with thetoggle members may be such (i. 6., with n the angle of repose) as tosubstantially lock the toggles when the position is reached at which theclutch is completely set and yet reserve further thrusting capacitysufficient to take up the Wear. This condition w, ll eX'st when the saidangle is about seven or e ght degrees, at which angle the friction ofthe spreader against the toggles will prevent its being pushed back. Aclearance-space is left between the stops 28 and 29 and the toggles inthe set position of the clutch, Fig. 2, to af ford this reservethrusting capacity, wh'ch clearance-space, however, is not suflicient topermit the toggles to reach a straight pos tion, or even if said angleis greater than the angle of repose. Nevertheless when com bined withthe screw 17 the total chain of mechanism will be substant allyself-reposing in all positions. The spreader 27 is swiveled to the endof the screw-shaft 17, so that when the clutch is set the spreader 27revolves with the shaft and the parts carried by the shaft. Neverthelessthis rotation of the spreader 27'produces a minimum of friction betweenit and the screw-shaft 17 by reason of the fact that in the set positionof the clutch the preferable angle of contact between the spreader andthe toggle members, being within the angle of repose, is such that theinward pressure of the toggle members may have no substantial tendencyto force the spreader 27 in either direction. In relation to the rotation of the shaft 3 the screw-shaft 17 j' s a relatively non-rotatingprime thrust-mover, the pin 14 is a rotating secondary thrust-mover, andthe power is multiplied between said thrust-movers by a mechanism whichalso rotates with the shaft, wherefore the point in the chain of thrustmechanism where contact occurs between the relatively non-rotating androtating parts is located where the power is umnultiplied and thefriction is consequently small.

If the walls of the case 18 are continuous, the chamber 19 may be usedas a tight receptacle to be filled with oil, entirely submerging thetoggles, the spreader, the ends of the pin 1 and shaft 17, the heads 22and-23, and the connection between those parts. The escape of the of lbackward along the shaft 17 will be prevented by the felt washer 26.

I wish to be understood as having described the best form of theembodiment of my invention, but not as limiting myself to the deta ls ofthe construction described. Having thus described my invention, I claimas new and desire to secure by Letters Patent- 1. In combination with arotating shaft, a

rope-drum and clutch members mounted on said shaft, the followingdrumthrusting' mechanism for setting said clutch: a cross key 13, athrust-pin 14, a screwshaft 17, a spreader swiveled to said screw-shaftand toggles operated by said spreader.

2. In combination, the rotating shaft, the clutch members, relativelyrotating and nonrotating thrust-movers located in and adj acent to theend of the shaft and a rotating power-multiplying mechanism interposedbetween said thrust-movers.

3. In combination, the rotating shaft, the

clutch members, relatively rotating and nonrotati'ng thrust-movers inalinement with the shaft and a power-multiplying mechanism interposedbetween said thrust-movers.

4. In combination, the rotating shaft ,a case mounted upon the endthereof, relatively rotating and non-rotating thrust-movers eX- tend nginto said case and a power-multiplying mechanism carried by said caseinterposed between said thrust-movers.

5. In combination, the rotating shaft, the case carried thereby, togglemechanism abutting at one end against said case and at the opposite endagainst a thrust-mover, said thrust-mover, a stationary frame, athrustmover mounted upon sa d stationary frame and provided withmechanism for operating said toggle mechanism.

6. In combination, a rotating-shaft, clutch members, relatively rotatingand non-rotating thrust-movers and a power-multiplying 'mechanisminterposed between said thrustmovers and upon the end of the shaftoutside the bearing thereof.

7. A device for transmitting power to the clutch-operating pin of arotating shaft from a relatively non-rotating actuator which consists ofa piece adapted to be fastened to the shaft, a reciprocating memberadapted to operate the pin and a toggle adapted to be controlled by saidactuator whereby said member is reciprocated relatively to said piece.

8. A device for transmitting power to the clutch-operating pin of arotating shaft from a relatively non-rotating actuator which consists ofa piece adapted to be fastened to the shaft, a member reciprocating onsaid piece and a power mechanism op'eratively interposed between saidpiece and member.

9. A device for transmitting power to the clutch-operating pin of arotating shaft from a relatively non-rotating actuator which consists ofa piece adapted to be fastened to the shaft, a reciprocating memberadapted to bear on the pin and a power mechanism operatively interposedbetween said piece and member and adapted to be operated by saidactuator.

10. A device for transmitting power to the clutch-operating pin of arotating shaft from a relatively non-rotating actuator which consists ofa piece adapted to be fastened to the shaft, a reciprocating memberadapted to smo tively interposed between said piece and said member andmeans of adjustment.

11. A device for transmitting power to the clutch-operating pin of arotating shaft from a relatively non-rotating actuator which consists ofa piece adapted to be fastened to the shaft, a reciprocating memberadapted to operate said pin, a power-transmitting mechanism operativelyinterposed between said piece and member and means whereby the relativeposition of said piece and member may be adjusted for a given positionof said power mechanism.

12. In combination, a clutch, its shaft, a clutch-operating pinextending into the end of the shaft, a reci rocating member facing theend of said sha 't and bearing against the end ofsaid pin, a powermechanism pivoted to said member, an abutment for said power mechanismfixed to the shaft and an actuator for said mechanism supportedindependently of the shaft.

13. In combination, a clutch, its shaft, a power mechanism mounted onthe end of the shaft, an actuator therefor, an independent support forsaid actuator and a connection from said power mechanism to said clutch.

14. In combination, a clutch, its shaft, a piece fixed around the end ofsaid shaft, a reciprocating member facing the end of said shaft, apowenmultiplying mechanism bearing on said piece and member and aconnection whereby motion is transmitted from said member to the clutch.

15. In combination, a clutch, its shaft, a piece fixed to said shaftaround its end, a reciprocating member facing the end of the shaft andhaving a bearing on said fixed piece, a power-multiplying mechanismoperatively interposed between said piece and member and a connectionwhereby motion is transmitted from said reciprocating member to theclutch.

16. In combination, a clutch, its shaft, a piece fixed to the end ofsaid shaft, a reciproeating member facing the end of the shaft andhaving a bearing on said fixed piece, a power mechanism bearing on saidpiece and member and a connection whereby motion is transmitted fromsaid reciprocating member to the clutch.

17. In combination, a clutch, its shaft, a piece fixed to said shaftaround its end, a reciprocating member facing the end of said shaft, apower-multiplying mechanism bearing on said piece and member, anoperative connection between said member and the clutch and an actuatorfor said mechanism having stationary bearings.

18. In combination, a clutch, its rotating shaft, a piece and a memberrotating with the shaft one of which is fixed to the end of said shaftand the other of which reciprocates facing the end of the shaft, a powermechanism rotating with the shaft and bearing on said piece and member,a connection rotating with the shaft and operatively connecting saidmember with the clutch and a rela tively non-rotating actuator for saidmechanism.

19. The combination with a clutch and its shaft, of a clutch-settingmechanism consist ing of a pin concentric with the shaft, a relativelynon-rotating actuator and a rotating power-multiplying mechanisminterposed between said actuator and pin.

20. The combination with a clutch and its shaft, of a clutch-settingmechanism, consisting of a pin concentric in the shaft, a piece fixed totheend of the shaft, a rotating power mechanism bearing backward againstsaid piece and forward against said pin and a relatively non-rotatingactuator for said powermultiplying mechanism.

21. In combination with a clutch, its shaft, a connection extendingbeyond the end of the shaft and a relatively non-rotating actuator, ofthe following parts interposed between said actuator and connection;viz: a

member carried by the shaft with freedom to reciprocate toward and fromthe end thereof, a power mechanism producing such reciprocations andcontrolled by said actuator.

22. Incombination with a clutch, its shaft, a connection extendingbeyond the end of the shaft and a relatively nonrotating actuator, ofthe following parts interposed between said actuator and connection,viz: a member free to reciprocate toward and from the end of said shaft,a piece fixed to said shaft whereby the reciprocations of said memberare guided and a power device producing such reciprocations andcontrolled by said actuator.

23. In combination with a clutch, its shaft, a connection extendingbeyond the end of the shaft and a relatively non-rotating actu ator, ofthe following parts interposed between said actuator a'nd connection,viz: a member reciprocating toward and from the end of said shaft, apiece secured to the shaft and containing an abutment and a power devicebearing against said abutment whereby said reciprocations are producedand which is controlled by said actuator.

24. In combination with a clutch, its shaft, a connection extendingbeyond the end of the shaft and a relatively non-rotating actuator, ofthe following parts interposed between said actuator and connection,viz: a member reciprocating toward and from the end of said shaft, apowermechanism producing said reciprocations and controlled by saidactuator and means of adjustment in the train of mechanism between saidactuator and reciprocating member.

25. In combination with a clutch, its shaft, a connection extendingbeyond the end of the shaft and a relatively non-rotating actu- I tweensaid actuator and connection, viz: an

annular piece fixed to said shaft to form an extension thereof, a memberguided by said piece to reciprocate toward and from the end of saidshaft, a power mechanism which bears against said piece and producessaid reciprocations under the control of said actuator.

27. In combination, a clutch, its shaft, a clutch-setting connectionextending from the clutch beyond the end of the shaft, twooppositely-disposed power devices rotating with the shaft at the endthereof for operating said connection, a relatively non-rotat ingactuator and spreading mechanism through which said actuator operatessaid power devices.

28. In combination, a clutch, a shaft, a power-multiplyingclutch-setting device rotating therewith and extending beyond the end ofthe shaft and beyond the line of the shaft a spreader extending withinthe line thereof whereby said device is operated, a relativelynon-rotating actuator for said spreader and a connection extendingthrough the shaft from said device to the clutch.

29. In a clutch mechanism the combination of the clutch members, a shafton which said members are mounted, bearings for the shaft, said clutchmembers being mounted on'said shaft between said bearings, aclutchactuating mechanism mounted on the shaft outside of said bearingscomprising a longitudinally movable member, thrust levers connectedthereto, means for actuating said thrust-levers, and devices forcommunicating the motion of the longitudinally-movable member to theclutch.

30. In combination, a rotating shaft, a clutch thereon, a thrust-pinextending into the shaft, a power-multiplying pin-thrustin g mechanism,a holder for the same exteriorly secured to the shaft, an actuator forsaid mechanism extending into the end of said holder, and a non-rotatingsupport for said actuator.

31. The combination of a shaft, a drivegear fast thereon, a drum looselymounted on said shaft and adapted to be shifted into engagement withsaid drive-gear, a casing at the end of the shaft, a thrust-pinextending from the easing into the drum-shaft, and means within thecasing adapted to rotate therewith and to contact with the thrust; pin,said means including a member movable longitudinally within the casing,and a device for actuating said member, said device com prising ascrew-shaft extending into the easing from the exterior thereof, and ahandwheel for turning said screw-shaft to move thelongitudinally-shiftable member into contact with the thrust member.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

THOMAS SPENCER MILLER.

Witnesses:

WALTER A. NAULING, J. J. DERRICK.

